5 2 |
Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units
Service Manual
08.2020
|
Bosch Thermotechnology Corp.
Data subject to change
8.6.7 Outdoor fan speed malfunction (E8)
Error Code
E8
Malfunction decision conditions
When outdoor fan speed is kept too low (300RPM) or too high (2400RPM) for certain amount of time,
the unit will stop and the LED will display the failure.
Supposed causes
f
Improper / Incorrect Wiring
f
Outdoor fan assembly faulty
f
Outdoor PCB faulty
Table 25
Troubleshooting:
Figure 59
Power off, then restart the
unit
3 minutes
later. Is it still
displaying the error code?
Power off, then restart the
unit
3 minutes
later. Is it still
displaying the error code?
Shut off the power supply,
rotate the fan by hand. Does
it rotate properly?
Shut off the power supply,
rotate the fan by hand. Does
it rotate properly?
The unit operates normally.
The unit operates normally.
Find out the cause and
have it solved. For
Find out the cause and
have it solved. For
example, check whether
the fan is blocked or the
screws which secure the
fan are ght.
Check the wiring of fan
motor. Are all the
connections good?
Check the wiring of fan
motor. Are all the
connections good?
No
Yes
No
Correct the connections.
Correct the connections.
No
Replace the fan motor
Replace the fan motor
Yes
Yes
Replace the
Replace the
No
heck whether the
is normal through index 1?
Check whether the outdoor PCB
is normal through index 1?
Yes
No
outdoor PCB
